Johann Hörl and Bernhard K. Aichernig. Requirements validation of a voice communication system used in air traffic control, an industrial application of light-weight formal methods (abstract). In Proceedings of the Fourth International Conference on Requirements Engineering (ICRE2000), June 19–23, 2000, Schaumburg, Illinois, page 190. IEEE, 2000. Selected as one of three best papers. (PostScript) (PDF)

Johann Hörl and Bernhard K. Aichernig. Formal specification of a voice communication system used in air traffic control, an industrial application of light-weight formal methods using vdm++ (abstract). In J.M. Wing, J. Woodcock, and J. Davies, editors, Proceedings of FM'99 – Formal Methods, World Congress on Formal Methods in the Development of Computing Systems, Toulouse, France, September 1999, volume 1709 of Lecture Notes in Computer Science, page 1868. Springer, 1999. (PostScript) (PDF)

Rudi Schlatte and Bernhard K. Aichernig. Database development of a work-flow planning and tracking system using VDM-SL. In John Fitzgerald and Peter Gorm Larsen, editors, Workshop Materials: VDM in Practice!, Part of the FM'99 World Congress on Formal Methods, Toulouse, September 1999. (PostScript) (PDF)